@article{oai:juen.repo.nii.ac.jp:00006570,
 author = {谷沢,  浩明},
 issue = {16},
 journal = {上越数学教育研究, Joetsu journal of mathematics education},
 month = {Mar},
 pages = {69--80},
 title = {文字式の学習過程に関する研究 : 事象と文字式の関連に焦点を当てて},
 year = {2001}
}